CVE-2026-47698

CRITICAL 9.8

vm2: Sandbox Breakout Using Dangerous Host Proto Mutators

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.6, lib/bridge.js and lib/setup-sandbox.js fail to block stacked indirection through Function.prototype.call around dangerous host prototype getter and setter mutators, allowing sandbox code to sever a host intrinsic's prototype chain and reach e.constructor.constructor for arbitrary host command execution. This issue is fixed in version 3.11.6.

CWE	CWE-913
Vendor	patriksimek
Product	vm2
Published	Aug 17, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

patriksimek / vm2

< 3.11.6

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/patriksimek/vm2/security/advisories/GHSA-cfcw-xp6x-25gj github.com: https://github.com/patriksimek/vm2/commit/a85acb61f81402c6eabf32760aa11272af6d0f9e github.com: https://github.com/patriksimek/vm2/releases/tag/3.11.6